add spim driver for npcm4xx internal flash.

CONFIG_XIP means system running code in the spi flash, in this use
case run code should locate in the RAM(SRAM).

disable regular exceptions interrupt when access internal flash, but
NMI, faults, or other interrupts that priority higher than BASEPRI
still have the ability to trigger in this time.

call npcm4xx_vector_table_save/restore() to replace/restore VTOR, so
CPU could fetch vector table from ram(sram) when interrupt happened.

1. spim driver only support single read/write mode spi flash access.
2. separate header.c to header file and source code.
3. when enable CONFIG_XIP, cannot write execution code space.
4. add sram vector table to replace VTOR when call save/restore API.
5. rename fiu driver structure naming.

Signed-off-by: cpchiang <[email protected]>

add npcm4xx firmware update when enable CONFIG_XIP.

1. add below API to support update firmware through running system.
   (1) external API: npcm4xx_set_update_fw_spi_nor_address()
       use for upper layer(like user space) to setting new firmware
       image location and write bitmap.
       SPI_NOR_SECTOR_SIZE per bit for write bitmap.

   (2) internal hook API: npcm4xx_spi_nor_set_update_fw_address()
       use for npcm4xx_set_update_fw_spi_nor_address() to call.

   (3) internal hook API: npcm4xx_spi_nor_do_fw_update()
       use for firmware update, the API will call when system reboot.

spim driver depend on write bitmap(default update all) to write new
firmware image to internel flash boot up space.

Signed-off-by: cpchiang <[email protected]>

increase npcm4xx i2c tx/rx dma buffer size.

for ipmb slave, max need 256 bytes.

Signed-off-by: cpchiang <[email protected]>

add ipmb slave driver from openbic framework.

fix ipmb_slave_read() may received wrong data if buffer not ready.

Signed-off-by: cpchiang <[email protected]>

add npcm4xx spip driver to support spi flash access.

only support single mode read/write spi command.

increase main stack size to 4096 to match openbic reference platform.

Signed-off-by: cpchiang <[email protected]>

rollback code to native framework.

Signed-off-by: cpchiang <[email protected]>